Jacqtjard-machine



F. DUCHACEK.

JACQUARD MACHINE.

APPLICATION FILED JUNK-119. 1919.

1 ,3 1 2,779. Patented Aug. 12, 1919.

WITNESS lNl/E/VTOR From I) u clmc eK I A TTORNEY.

UNITED srarns PATENT OFFICE.

FRANK DUCHACEK, OF PATERSON, NEW JERSEY.

JAG QUARD MACI-IINE.

"Application filed June 19, 1919.

To all whom it may concern:

Be it known that I, FRANK DUCHAGEK, a Czecho-Slovak, residing at Paterson, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in J acquardlVIachines, of which the following is a specification.

In certain jacquard machines the cylinder is carried by a pair of horizontal rods arranged to slide lengthwise in bearings in cars on the frame, thus to move the cards on the cylinder to and from the needles. On account of the weight of the parts and because the leverage which the arms exert in said bearings varies as the rods reciprocate the bearings become worn elliptical, up and down and they also undergo a certain amount of sidewise wear, in consequence of which when the cylinder is carried inward the card holes fail to registerwith the needles, so that the latter will be actuated when they should not be. To overcome this difliculty there have been heretofore proposed and used lifting arms pivoted at their lower ends to the frame and having slots at their upper ends receiving the trunnions of the cylinder and calculated to support the cylinder, by the lower ends of the slots engaging said trunnions, when the cylinder was'fully in. But here, again, wear takes place at the lower ends of the slots due to the impact of the trunnions against them, so that in time this arrangement results also in failure of the card holes to register with the needles.

My invention has for its object to provide means, auxiliary to the rods and ears, to support the cylinder so as not only to very materially delay the wear which is incident to the back and forth movements of the cylinder but to allow any wear which does occur to be readily taken up, and thus keep the cylinder true with respect to the needles.

In the accompanying drawing,

Figure l is a side elevation of a jacquard machine having my improvement, only so much of the machine as is necessary to illustrate the invention being shown; and

Fig. 2 is an elevation of what is shown in Fig. 1 looking toward the right in said figure.

In the drawing, a designates the frame of jacquard machine and b the ears or brackets thereon in which slide longitudinally the horizontal rods 0 affording bearings for the journals (Z of the card cylinder 6. f is a Specification of Letters Patent.

Serial No. 305,286.

part of the means suitably connected with the rods 0 for reciprocating them so as to move the cards 9 on the cylinder to and from the needles h which control the hooks of the machines, and z' denotes the pawls for turning the card cylinder step-by-step as it reciprocates. j designates a pair of hangers rigidly secured to the ends of the rods c andusually employed as means to support and guide the spring plungers is which hold the card cylinder against turning after each rotary impulse imparted thereto by the hooks i.

To the frame a I secure the parallel arms Z, each projecting beyond the corresponding hanger 7' when the same is in its fully outward position, being disposed rather close to the inner side thereof. The two arms have straight horizontal top surfaces or edges, and each is preferably secured to the frame so that it can be adjusted vertically, as by the slot m in the frame receiving the bolt '12. and nut 0 for clamping the arm to the frame. It is not material at what height the arms are secured to the frame but I prefer to place them well below the rods 0 as shown in the drawing.

On a stud 70 secured to each hanger is journaled a roller g which is adapted to travel on top of the arm Z. This roller prevents the rods 0 from sagging under the weight of the cylinder, especially when they are, in their fully outward position, so that the tendency to wear the hearings in the brackets 79- b elliptically is avoided. Each roller 9 is confined against movement longtudinally of its axis, and to keep said roller and consequently the structure jc and the cylinder carried thereby against side-lash the roller has a suitable engagement with the corresponding arm Z that prevents its movement sidewise of saidarm, as by providing the roller with a peripheral groove 1" which fits the cross-sectional shape of the top surface or edge of the arm as shown in Fig. 2 in eflect, a tongue and groove engagement.

In view of the foregoing it will be seen that my improvement not only delays materially any wear of the bearings in the brackets Z) Z) or of the rods 0, so that the cards continue longer to register accurately with the needles h, the parts forming my invention operating substantially without friction, but that if wear does occur it may be readily taken up by adjusting the arms Z upwardly of the slots m.

Patented Aug.- 1 2, 1919.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a jacquard machine or the like, the combination of the frame, a horizontally reciprocating cylinder carrying structure including horizontal rods guided in the frame, said structure including depending portions rigid with reference to said rods, a pair of horizontal arms rigidly projecting from said frame, and rollers journaled on the depending portions of said structure on horizontal axes and arranged to roll on said arms.

2. In a jacquard machine or the like, the

combination of the frame, a horizontally reciprocating cylinder-carrying structure including horizontal rods guided in the frame, said structure including depending portions rigid with reference to said rods, a pair of horizontal arms rigidly projecting from said frame, and rollers j ournaled on the depending portions of said structure on horizontal axes and arranged to roll on said arms, said rollers each having a peripheral tongue and groove engagement with the corresponding arm and being each held against movement longitudinally of its axis.

In testimony whereof I aflix my signature.

FRANK DUCHACEK.

Copies 0! this patent may be obtained for five cents each, by addressing the Commissioner or Patentl, Washington, D. G. 

